Invalid Fair Catch Signal

Definition

Valid Fair-Catch Signal: A fair-catch signal is valid if it is made while the kick is in flight by a player who fully extends one arm above his helmet and waves it from side to side. A receiver is permitted to legally raise his hand(s) to his helmet to shield his eyes from the sun, but is not permitted to raise them above his helmet except to
signal for a fair catch. If a player raises his hand(s) above his shoulder(s) in any other manner, it is an invalid fair-catch signal.